package com.website.system.utils;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.lang.StringUtils;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

public class HttpUtils {

    /**

     * get

     *

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @return

     * @throws Exception

     */

    public static HttpResponse doGet(String host, String path, String method,

                                     Map<String, String> headers,

                                     Map<String, String> querys)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpGet request = new HttpGet(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        return httpClient.execute(request);

    }



    /**

     * post form

     *

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @param bodys

     * @return

     * @throws Exception

     */

    public static HttpResponse doPost(String host, String path, String method,

                                      Map<String, String> headers,

                                      Map<String, String> querys,

                                      Map<String, String> bodys)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpPost request = new HttpPost(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        if (bodys != null) {

            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();



            for (String key : bodys.keySet()) {

                nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key)));

            }

            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, "utf-8");

            formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8");

            request.setEntity(formEntity);

        }



        return httpClient.execute(request);

    }



    /**

     * Post String

     *

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @param body

     * @return

     * @throws Exception

     */

    public static HttpResponse doPost(String host, String path, String method,

                                      Map<String, String> headers,

                                      Map<String, String> querys,

                                      String body)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpPost request = new HttpPost(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        if (StringUtils.isNotBlank(body)) {

            request.setEntity(new StringEntity(body, "utf-8"));

        }



        return httpClient.execute(request);

    }



    /**

     * Post stream

     *

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @param body

     * @return

     * @throws Exception

     */

    public static HttpResponse doPost(String host, String path, String method,

                                      Map<String, String> headers,

                                      Map<String, String> querys,

                                      byte[] body)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpPost request = new HttpPost(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        if (body != null) {

            request.setEntity(new ByteArrayEntity(body));

        }



        return httpClient.execute(request);

    }



    /**

     * Put String

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @param body

     * @return

     * @throws Exception

     */

    public static HttpResponse doPut(String host, String path, String method,

                                     Map<String, String> headers,

                                     Map<String, String> querys,

                                     String body)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpPut request = new HttpPut(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        if (StringUtils.isNotBlank(body)) {

            request.setEntity(new StringEntity(body, "utf-8"));

        }



        return httpClient.execute(request);

    }



    /**

     * Put stream

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @param body

     * @return

     * @throws Exception

     */

    public static HttpResponse doPut(String host, String path, String method,

                                     Map<String, String> headers,

                                     Map<String, String> querys,

                                     byte[] body)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpPut request = new HttpPut(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        if (body != null) {

            request.setEntity(new ByteArrayEntity(body));

        }



        return httpClient.execute(request);

    }



    /**

     * Delete

     *

     * @param host

     * @param path

     * @param method

     * @param headers

     * @param querys

     * @return

     * @throws Exception

     */

    public static HttpResponse doDelete(String host, String path, String method,

                                        Map<String, String> headers,

                                        Map<String, String> querys)

            throws Exception {

        HttpClient httpClient = wrapClient(host);



        HttpDelete request = new HttpDelete(buildUrl(host, path, querys));

        for (Map.Entry<String, String> e : headers.entrySet()) {

            request.addHeader(e.getKey(), e.getValue());

        }



        return httpClient.execute(request);

    }



    private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {

        StringBuilder sbUrl = new StringBuilder();

        sbUrl.append(host);

        if (!StringUtils.isBlank(path)) {

            sbUrl.append(path);

        }

        if (null != querys) {

            StringBuilder sbQuery = new StringBuilder();

            for (Map.Entry<String, String> query : querys.entrySet()) {

                if (0 < sbQuery.length()) {

                    sbQuery.append("&");

                }

                if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {

                    sbQuery.append(query.getValue());

                }

                if (!StringUtils.isBlank(query.getKey())) {

                    sbQuery.append(query.getKey());

                    if (!StringUtils.isBlank(query.getValue())) {

                        sbQuery.append("=");

                        sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));

                    }

                }

            }

            if (0 < sbQuery.length()) {

                sbUrl.append("?").append(sbQuery);

            }

        }



        return sbUrl.toString();

    }



    private static HttpClient wrapClient(String host) {

        HttpClient httpClient = new DefaultHttpClient();

        if (host.startsWith("https://")) {

            sslClient(httpClient);

        }



        return httpClient;

    }



    private static void sslClient(HttpClient httpClient) {

        try {

            SSLContext ctx = SSLContext.getInstance("TLS");

            X509TrustManager tm = new X509TrustManager() {

                public X509Certificate[] getAcceptedIssuers() {

                    return null;

                }

                public void checkClientTrusted(X509Certificate[] xcs, String str) {



                }

                public void checkServerTrusted(X509Certificate[] xcs, String str) {



                }

            };

            ctx.init(null, new TrustManager[] { tm }, null);

            SSLSocketFactory ssf = new SSLSocketFactory(ctx);

            ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

            ClientConnectionManager ccm = httpClient.getConnectionManager();

            SchemeRegistry registry = ccm.getSchemeRegistry();

            registry.register(new Scheme("https", 443, ssf));

        } catch (KeyManagementException ex) {

            throw new RuntimeException(ex);

        } catch (NoSuchAlgorithmException ex) {

            throw new RuntimeException(ex);

        }

    }
}
